140423245591 has 4 divisors (see below), whose sum is σ = 140431782384. Its totient is φ = 140414708800.

The previous prime is 140423245583. The next prime is 140423245631. The reversal of 140423245591 is 195542324041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140423245591 - 2³ = 140423245583 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140423245511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4243675 + ... + 4276636.

It is an arithmetic number, because the mean of its divisors is an integer number (35107945596).

Almost surely, 2^140423245591 is an apocalyptic number.

140423245591 is a deficient number, since it is larger than the sum of its proper divisors (8536793).

140423245591 is an equidigital number, since it uses as much as digits as its factorization.

140423245591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536792.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 140423245591 in words is "one hundred forty billion, four hundred twenty-three million, two hundred forty-five thousand, five hundred ninety-one".